Data extraction, transformation, and loading

A system comprising:

• one or more processors to:
• receive instructions for handling data from a plurality of data sources,
• map each of the instructions to one of a plurality of classes that are in one or more types of object-oriented programming languages,
• annotate the plurality of classes to refer to the instructions that are mapped to the plurality of classes,
• create the plurality of processing objects based on the instructions and the plurality of annotated classes, and
• perform, by using the plurality of processing objects, a plurality of data processing activities to process the data.

A non-transitory computer-readable medium storing instructions, the instructions comprising:

• one or more instructions that, when executed by one or more processors of a computer device, cause the one or more processors to:
• receive instructions associated with extracting, transforming, and loading data;
• identify a plurality of data processing activities based on the instructions;
• determine a processing sequence for performing the plurality of data processing activities;
• associate the instructions with a plurality of classes that are in one or more types of object-oriented programming languages;
• create, based on the plurality of classes and the instructions, a plurality of processing objects corresponding to the plurality of data processing activities;
• and
• perform the plurality of data processing activities in accordance with the processing sequence and by using the plurality of processing objects.